Arisaema specialists we have here at all?
So many time I would have liked sure even a...
Bernhard's tip is actually what I always did. After download I simply put the pots with the former sowing in the basement and forget to spring. At onset bud I've involved then further care. If your sowing gefäße are not super almost calculated, actually also a Repotting should be unnecessary. Compared with some other Aronstabgewächsen, the growth of the tubers is still comparatively low, where I now have with tortuosum no experience... be that I think relatively large or?
Whether you then damp order dry should store the pots/tubers, I can't say unfortunately, you due to the lack of experience with the way. Some types can be stored easily even without substrate, others tend to do so also in the substrate to dry out if you don't at least from time to time to befeuchtet in winter.
The winter outside (but in the bed) would be worth certainly also a try. If the type is winter hardy, this is actually usually the easiest... where I personally trust me always do not, to my tubers shipping buddeln.
Watch this then produced to a sufficient depth and watch, that the tubers are not to wet/mushy.